Davy described the game "Killer" in great detail in his autobiography, They Made a Monkee Out of Me. I quoted that passage in my blog; here's a taste:

"The game produced no end of possibilities for going right over the top. In the middle of a love scene once—I had the stars coming out of my eyes, the whole bit—I’m about to kiss when… ‘Tsshhh’—Peter shoots me. I have to go into an epileptic seizure routine for about five minutes—knocking lamps over, falling over a drum kit, out the door, roll around the parking lot, up the stairs, across the president’s desk—'O my God, are you alright, David?'—'Aaargh! Shot, sir!' Back out the door, down the stairs, onto the set, —collapse in a heap at her feet. Wild applause."

I am convinced that Peter's "death" in the Mary, Mary romp at the end of I've Got a Little Song Here, and Micky's spectacular "death" in the foxhole in Head, are little glimpses of this game.